scholarly journals Economic benefits of sport fishing in Los Cabos, Mexico: is the relative abundance a determinant?

2012 ◽  
Author(s):  
V. A. Hernández-Trejo ◽  
G. Ponce-Díaz Germán ◽  
D. Lluch-Belda ◽  
L. F. Beltrán-Morales
Keyword(s):  
Relative Abundance ◽  
Economic Benefits ◽  
Sport Fishing

Economic Benefits of Sport Fishing and Angler Wildlife Watching in Pennsylvania

2001 ◽  
Vol 40 (1) ◽  
pp. 68-78 ◽  
Author(s):  
Arun Upneja ◽  
Elwood L. Shafer ◽  
Wonseok Seo ◽  
Jihwan Yoon
Keyword(s):  
Economic Benefits ◽  
Sport Fishing

Economic Benefits of Sport Fishing and Angler Wildlife Watching in Pennsylvania: A Comment

2002 ◽  
Vol 41 (2) ◽  
pp. 210-211 ◽  
Author(s):  
Roger H. Coupal ◽  
Chris T. Bastian ◽  
David T. Taylor
Keyword(s):  
Economic Benefits ◽  
Sport Fishing

scholarly journals Peacock bass mortality associated with catch-and-release sport fishing in the Negro River, Amazonas State, Brazil

2014 ◽  
Vol 44 (4) ◽  
pp. 527-532 ◽  
Author(s):  
Mario J. F. Thomé-Souza ◽  
Michael J. Maceina ◽  
Bruce R. Forsberg ◽  
Bruce G. Marshall ◽  
Álvaro L. Carvalho
Keyword(s):  
Confidence Intervals ◽  
Brazilian Amazon ◽  
Economic Benefits ◽  
Sport Fishing ◽  
Rural Regions ◽  
Catch And Release ◽  
Negro River ◽  
Amazonas State ◽  
Peacock Bass ◽  
River Fish

Sport fishing for peacock bass Cichla spp. in the Brazilian Amazon has increased in popularity and attracts anglers who generate significant economic benefits in rural regions. The sustainability of this fishery is partly dependent on the survival of fish caught through catch-and-release fishing. The objective of this work was to investigate, hooking mortality of Cichla spp., including speckled peacock bass (C. temensis Humbolt), butterfly peacock bass (C. orinocensis Humbolt), and popoca peacock bass (C. monoculus Agassiz) in the basin of the Negro River, the largest tributary of the Amazon River. Fish were caught at two different sites using artificial lures, transported to pens anchored in the river and monitored for 72 hours. A total of 162 individual peacock bass were captured and hooking mortality (mean % ± 95% confidence intervals) was calculated. Mean mortality was 3.5% (± 5.0), 2.3% (± 3.5) and 5.2% (± 10.2) for speckled peacock bass, butterfly peacock bass, and popoca peacock bass, respectively. Lengths of captured fish ranged from 26 to 79 cm (standard length), however, only fish under 42 cm died. This research suggests that catch-and-release sport fishing of peacock bass does not result in substantial mortality in the Negro River basin.

Economic Benefits of Sport Fishing and Angler Wildlife Watching in Pennsylvania: Revisited

2002 ◽  
Vol 41 (2) ◽  
pp. 212-213 ◽  
Author(s):  
Elwood Shafer ◽  
Arun Upneja
Keyword(s):  
Economic Benefits ◽  
Sport Fishing

scholarly journals Effects of Betaine Aldehyde Dehydrogenase-Transgenic Soybean on Phosphatase Activities and Rhizospheric Bacterial Community of the Saline-Alkali Soil

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Ying Nie ◽  
Da-qing Wang ◽  
Guang Zhao ◽  
Song Yu ◽  
Hong-yan Wang
Keyword(s):  
Bacterial Community ◽  
Aldehyde Dehydrogenase ◽  
Relative Abundance ◽  
Economic Benefits ◽  
Growth Stages ◽  
Betaine Aldehyde Dehydrogenase ◽  
Rhizospheric Soil ◽  
Transgenic Soybean ◽  
Soil Microbial Diversity ◽  
Betaine Aldehyde

The development of transgenic soybean has produced numerous economic benefits; however the potential impact of root exudates upon soil ecological systems and rhizospheric soil microbial diversity has also received intensive attention. In the present study, the influence of saline-alkali tolerant transgenic soybean of betaine aldehyde dehydrogenase on bacterial community structure and soil phosphatase during growth stages was investigated. The results showed that, compared with nontransgenic soybean as a control, the rhizospheric soil pH of transgenic soybean significantly decreased at the seedling stage. Compared to HN35, organic P content was 13.5% and 25.4% greater at the pod-filling stage and maturity, respectively. The acid phosphatase activity of SRTS was significantly better than HN35 by 12.74% at seedling, 14.03% at flowering, and 59.29% at podding, while alkaline phosphatase achieved maximum activity in the flowering stage and was markedly lower than HN35 by 13.25% at pod-filling. The 454 pyrosequencing technique was employed to investigate bacterial diversity, with a total of 25,499 operational taxonomic units (OTUs) obtained from the 10 samples. Notably, the effect of SRTS on microbial richness and diversity of rhizospheric soil was marked at the stage of podding and pod-filling. Proteobacteria, Acidobacteria, and Actinobacteria were the dominant phyla among all samples. Compared with HN35, the relative abundance of Proteobacteria was lower by 2.01%, 2.06%, and 5.28% at the stage of seedling, at pod-bearing, and at maturity. In genus level, the relative abundance of Gp6,Sphingomonassp., and GP4 was significantly inhibited by SRTS at the stage of pod-bearing and pod-filling.

scholarly journals Impacts of Long-Term Irrigation of Domestic Treated Wastewater on Soil Biogeochemistry and Bacterial Community Structure

2015 ◽  
Vol 81 (20) ◽  
pp. 7143-7158 ◽  
Author(s):  
Denis Wafula ◽  
John R. White ◽  
Andy Canion ◽  
Charles Jagoe ◽  
Ashish Pathak ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Relative Abundance ◽  
Bacterial Community Structure ◽  
Rflp Analysis ◽  
Economic Benefits ◽  
Treated Wastewater ◽  
Rrna Genes ◽  
Content Type

ABSTRACTFreshwater scarcity and regulations on wastewater disposal have necessitated the reuse of treated wastewater (TWW) for soil irrigation, which has several environmental and economic benefits. However, TWW irrigation can cause nutrient loading to the receiving environments. We assessed bacterial community structure and associated biogeochemical changes in soil plots irrigated with nitrate-rich TWW (referred to as pivots) for periods ranging from 13 to 30 years. Soil cores (0 to 40 cm) were collected in summer and winter from five irrigated pivots and three adjacently located nonirrigated plots. Total bacterial and denitrifier gene abundances were estimated by quantitative PCR (qPCR), and community structure was assessed by 454 massively parallel tag sequencing (MPTS) of small-subunit (SSU) rRNA genes along with terminal restriction fragment length polymorphism (T-RFLP) analysis ofnirK,nirS, andnosZfunctional genes responsible for denitrification of the TWW-associated nitrate. Soil physicochemical analyses showed that, regardless of the seasons, pH and moisture contents (MC) were higher in the irrigated (IR) pivots than in the nonirrigated (NIR) plots; organic matter (OM) and microbial biomass carbon (MBC) were higher as a function of season but not of irrigation treatment. MPTS analysis showed that TWW loading resulted in the following: (i) an increase in the relative abundance ofProteobacteria, especiallyBetaproteobacteriaandGammaproteobacteria; (ii) a decrease in the relative abundance ofActinobacteria; (iii) shifts in the communities of acidobacterial groups, along with a shift in thenirKandnirSdenitrifier guilds as shown by T-RFLP analysis. Additionally, bacterial biomass estimated by genus/group-specific real-time qPCR analyses revealed that higher numbers of total bacteria,Acidobacteria,Actinobacteria,Alphaproteobacteria, and thenirSdenitrifier guilds were present in the IR pivots than in the NIR plots. Identification of thenirK-containing microbiota as a proxy for the denitrifier community indicated that bacteria belonged to alphaproteobacteria from theRhizobiaceaefamily within the agroecosystem studied. Multivariate statistical analyses further confirmed some of the above soil physicochemical and bacterial community structure changes as a function of long-term TWW application within this agroecosystem.

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